I tried to build a small Logic system with Rails on all four sides of a ship. Because I wanted to save time I made a Template of the system to Copy/Paste it to the other sides. After rotating and pasting the Template with the rails facing upwards to the left side, I noticed that the rails are now facing right instead of left.
After building an arrow with a Rail it was clearly visible, that the Rails are turning in the opposite direction when rotating with the mouse wheel or when rotating using Left Strg+mouse wheel. Rotating using shift+mouse wheel is working.
Tested on ships, docked ships and Stations (using Buildblock).
PS: Left Strg is the german equivalent to Left Ctrl.